Science

They are also used in analytical chemistry, e.g. to detect aldehydes (Tollens test).

Shapes resemble raindrops, rods, or lenses, and vary in shades of yellow, red, orange, brown, and even white opaque. Approximately 300 colors have been cataloged up to this day.

It was named after the German astronomer, Johannes Kepler.

The most recent theory proposes that both Phobos and Deimos shared a common progenitor that shattered upon collision with another object, forming two Mars satellites.

The very early universe lasted only a picosecond, during which time the laws of physics that we know today had not yet developed.

It is longer than the sidereal month because in the process of illuminating the moon's disk, we must take into account the movement of the Moon itself, as well as the Earth and the Sun.